Display device

ABSTRACT

Disclosed is a display device including: a substrate including a display area for displaying an image and a peripheral area neighboring the display area; a plurality of signal lines formed in the display area; a pad formed in the peripheral area; and a plurality of connection wires for connecting the signal lines and the pad, wherein a first connection wire and a second connection wire neighboring the first connection wire from among the plurality of connection wires are disposed on different layers, and the first connection wire and the second connection wire, which are formed to extend from the pad and are bent at least twice to have at least one being bent toward backward direction, are disposed in the peripheral area.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. application Ser. No.15/161,774 filed on May 23, 2016, which claims priority under 35 U.S.C.§ 119 to Korean Patent Application No. 10-2015-0129682 filed in theKorean Intellectual Property Office on Sep. 14, 2015, the entirecontents of which are incorporated by reference herein in theirentirety.

BACKGROUND OF THE INVENTION (a) Technical Field

The present invention relates to a display device.

(b) Discussion of the Related Art

Currently known display devices include a liquid crystal display (LCD),a plasma display panel (PDP), an organic light emitting diode (OLED)device, a field effect display (FED), and an electrophoretic displaydevice.

In particular, the OLED device of the above known display devicesincludes two electrodes and an organic emission layer positioned betweenthe two electrodes; an electron injected from one electrode and a holeinjected from the other electrode are coupled with each other in theorganic emission layer to generate an exciton; and the exciton emitsenergy to emit light.

Since the OLED device has a self-luminance characteristic and does notrequire a separate light source, unlike an LCD, its thickness and weightmay be reduced. Further, since the OLED device has superiorcharacteristics, such as low power consumption, high luminance, and ahigh response speed, the OLED device has gained attention as anext-generation display device.

To drive an organic light emitting element of the organic light emittingdevice, a fan out unit for connecting a gate line (or a data line) and agate IC (or a data IC) is formed in a peripheral area of a substrate.However, connection wires formed on the fan out unit may have differentlengths so as to have different resistances, thereby delaying signalstransmitted through the connection wires.

SUMMARY OF THE INVENTION

The present invention has been made to provide a display device forminimizing differences in the length of connection wires of a fan outunit.

According to an exemplary embodiment of the present invention, there isprovided a display device including: a substrate including a displayarea for displaying an image and a peripheral area neighboring thedisplay area; a plurality of signal lines formed in the display area; apad formed in the peripheral area; and a plurality of connection wiresfor connecting the signal lines and the pad, wherein a first connectionwire and a second connection wire neighboring the first connection wirefrom among the plurality of connection wires are disposed on differentlayers, and the first connection wire and the second connection wire aredisposed in the peripheral area in a shape so that they extend to thedisplay area from the pad and bend at least twice to have at least onebeing bent toward backward direction.

The first and second connection wires may be disposed separately fromeach other with a predetermined gap.

The first connection wire and the second connection wire each mayinclude: a first connector connected to the pad and a second connectorconnected to the signal line; and an extension connected between thefirst and second connectors, the extension including a plurality offirst bridges disposed parallel to the first connector and a pluralityof second bridges forming a predetermined angle with the first bridges,and the first bridges and the second bridges being alternatelyconnected. Here, the term “bridge” may also be referred to as “portion”.

The adjacent first and second bridges may be vertical to each other.

The first bridges may be disposed parallel to each other.

The neighboring first bridges from among the first bridges may be formedto have the same length.

The second bridges may be disposed parallel to each other.

The second bridges may be formed to have different lengths.

The second bridges may be formed to have the same length.

The first bridges may be longer than the second bridges.

The second connector may be bent.

Extension of the first connection wire and extension of the secondconnection wire neighboring the first connection wire may be rotated by180 degrees and may be symmetrical with each other.

Neighboring edges of the first and second connection wires may overlapeach other.

The pad may include a plurality of connecting pad terminals connected tothe connection wires and a plurality of dummy pad terminals notconnected to the connection wires.

The first and second connection wires may be connected to the connectingpad terminal.

The display device may further include a flexible film that is connectedto the pad and that includes a first side on which a first driving chipis provided.

The display device may further include a second driving chip formed inthe peripheral area and connected to the pad.

An insulating layer may be provided between the first and secondconnection wires.

Signal lines connected to the first and second connection wires fromamong the signal lines may be formed on different layers.

The connection wires may be formed to be double layers, triple layers,or quadruple layers.

The signal lines may be gate lines.

The signal lines may be data lines.

In an exemplary embodiment of the present invention, there is provided adisplay device including: a substrate having a display panel and a pad;a plurality of signal lines formed in the display panel; a plurality ofconnecting pad terminals formed in the pad; and a plurality ofconnection wires formed on the substrate for connecting the signal linesand the connecting pad terminals, wherein a first connection wire and asecond connection wire neighboring the first connection wire from amongthe plurality of connection wires are disposed and separated from eachother with a predetermined gap on different layers, and the firstconnection wire and the second connection wire having a same length,which are shaped to extend to the display panel from the pad and arebent at least twice to have at least one being bent toward backwarddirection.

In the display device according to an exemplary embodiment of thepresent invention, the transmission of signals is prevented from beingdelayed by allowing the connection wires of the fan out unit to have thesame length.

Further, adjacent connection wires are disposed on different layers tominimize the gap among the connection wires and thereby increase theintegrity of the connection wires.

In addition, adjacent connection wires are disposed on different layersto prevent the connection wires from being short-circuited by a foreignparticle.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments of the inventive concept may best be understoodfrom the following detailed description of preferred embodiments, takenin conjunction with the appended drawings, and in which:

FIG. 1 shows a partial top plan view of a display device includingconnection wires according to a first exemplary embodiment of theinventive concept;

FIG. 2 shows a display area of FIG. 1 according to an exemplaryembodiment of the inventive concept;

FIG. 3 shows a cross-sectional view with respect to line III-III of FIG.2 according to an exemplary embodiment of the inventive concept;

FIG. 4 shows an enlarged view of connection wires in region A of FIG. 1according to a first exemplary embodiment of the inventive concept;

FIG. 5 shows first and second connection wires of FIG. 4 according to anexemplary embodiment of the inventive concept;

FIG. 6 shows a cross-sectional view with respect to line VI-VI of FIG. 4according to an exemplary embodiment of the inventive concept;

FIG. 7 shows an exemplary variation of connection wires according to afirst exemplary embodiment of the inventive concept;

FIG. 8 shows a cross-sectional view with respect to line VIII-VIII ofFIG. 7 according to an exemplary embodiment of the inventive concept;

FIG. 9 shows an exemplary variation of a driving chip of FIG. 1according to an exemplary embodiment of the inventive concept;

FIG. 10 shows an enlarged view of connection wires according to a secondexemplary embodiment of the inventive concept;

FIG. 11 shows first and second connection wires of FIG. 10 according toan exemplary embodiment of the inventive concept;

FIG. 12 shows a cross-sectional view with respect to line XII-XII ofFIG. 10 according to an exemplary embodiment of the inventive concept;and

FIG. 13 shows a comparison of connection wires configured with a singlelayer and double layers according to an exemplary embodiment of theinventive concept.

Since the drawings in FIGS. 1-13 are intended for illustrative purpose,the elements in the drawings are not necessarily drawn to scale. Forexample, some of the elements may be enlarged or exaggerated for claritypurpose.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In the following detailed description, only certain exemplaryembodiments of the inventive concept have been shown and described,simply by way of illustration. As those skilled in the art wouldrealize, the described exemplary embodiments may be modified in variousdifferent ways, all without departing from the spirit or scope. Thedrawings and description are to be regarded as illustrative in natureand not restrictive. Like reference numerals designate like elementsthroughout the specification.

The size and thickness of each component illustrated in the drawings arearbitrarily illustrated in the drawings for better understanding andease of description, but the present invention is not limited to theillustrations.

It will be understood that when an element, for example, a layer, film,region, or substrate is referred to as being “on” another element, itcan be directly on the other element or intervening elements may also bepresent. In addition, throughout the specification, unless explicitlydescribed to the contrary, the word “comprise” and variations, forexample, “comprises” or “comprising” will be understood to imply theinclusion of stated elements but not the exclusion of any otherelements. It is understood that the term “on” and similar terms are usedgenerally and are not necessarily related to a gravitational reference.

A display device including connection wires according to a firstexemplary embodiment of the inventive concept will now be described withreference to FIG. 1 to FIG. 6.

FIG. 1 shows a partial top plan view of a display device includingconnection wires according to a first exemplary embodiment of theinventive concept. FIG. 2 shows a display area of FIG. 1, and FIG. 3shows a cross-sectional view with respect to line of FIG. 2.

Referring to FIG. 1 to FIG. 3, the display device includes a substrate(SUB), a display panel 100, a pad (P), a flexible film 400, and aplurality of connection wires 300.

From among a plurality of connection wires 300 for connecting thedisplay panel 100 and the pad (P), first and second connection wires 311and 312 that are adjacent to each other are formed on different layers,are separated from each other with a predetermined gap, and are disposedparallel to each other. FIG. 4 shows an enlarged view of connectionwires in region A of FIG. 1. As shown in FIG. 4, the first and secondconnection wires 311 and 312 include a section extended to the displaypanel 100 from the pad (P) in a second direction, in which theseconnection wires are extended to the display panel 100 in a forwarddirection, bent to extend toward the pad (P) in a backward direction,and then bent to extend to the display panel 100. An X axis representsthe first direction and a Y axis indicates the second direction. Thefirst and second connection wires 311 and 312 are bent at least twice,and these wires are bent toward backward direction at least once.

Referring to FIG. 1, the substrate (SUB) is divided into a display area(DA) for displaying an image and a peripheral area (PA) neighboring thedisplay area (DA). A display panel 100 for emitting light may beprovided in the display area (DA). A plurality of connection wires 300,a pad (P), and a flexible film 400 for driving the display panel 100 maybe provided in the peripheral area (PA). The above-described componentsprovided on the substrate (SUB) will be described further.

Referring to FIG. 2 and FIG. 3, the display panel 100 formed in thedisplay area (DA) of the substrate (SUB), includes first gate wires(GW1), second gate wires (GW2), data wires (DW), a display unit 140, anda pixel 150.

In response to a control signal supplied by an external control circuit(e.g., a timing controller), the gate driver 210 sequentially suppliesscan signals to first scan lines (SC2-SC2 n) or second scan lines(SC1-SC2 n−1) included in the first gate wires GW1 or the second gatewires GW2. The pixel 150 is selected by the scan signal and sequentiallyreceives a data signal. The gate driver 210 shown in FIG. 2 is formed ina first driving chip 200 on a flexible film 400, and it is shown in FIG.2 for convenience of description.

The first gate wires GW1 as shown in FIG. 3 are provided on thesubstrate (SUB) with a first insulating layer G11 therebetween, and areextended in a first direction. The first gate wires GW1 include a secondscan line (SC2 n−1) and emission control line (E1-En). The second scanline (SC2 n−1) is connected to a gate driver 210 and receives a scansignal from the gate driver 210. An emission control line (En) isconnected to an emission control driver 220 and receives an emissioncontrol signal from the emission control driver 220. In a like manner asthe gate driver 210, the emission control driver 220 shown in FIG. 2 isformed in the first driving chip 200 on the flexible film 400 and isshown in FIG. 2 for ease of description.

The second gate wires GW2 are provided on the first gate wires GW1 witha second insulating layer G12 therebetween, and are extended in thefirst direction. The second gate wires GW2 include a first scan line(SC2 n) and an initialization power line (Vinit). The first gate wiresGW1 do not overlap the second gate wires GW2.

The first scan line (SC2 n) is connected to the gate driver 210 andreceives a scan signal from the gate driver 210. The initializationpower line (Vinit) is connected to the gate driver 210 and receivesinitialization power from the gate driver 210.

In an exemplary embodiment of the inventive concept, the initializationpower line (Vinit) receives the initialization power from the gatedriver 210, and it may be connected to another additional component andmay receive initialization power from the additional component.

The emission control driver 220 sequentially supplies an emissioncontrol signal to the emission control line (En) corresponding to acontrol signal supplied by an external component such as a timingcontroller. The pixel 150 undergoes emission control by the emissioncontrol signal. That is, the emission control signal controls anemission time of the pixel 150. The emission control driver 220 may beomitted depending on a configuration of the pixel 150.

The data driver 230 supplies a data signal to a data line (DAm) fromamong the data wires (DW) corresponding to a control signal supplied byan external component such as a timing controller. The data signalprovided to the data line (DAm) is supplied to the pixel 150 selected bya scan signal each time when the scan signal is supplied to the firstscan line (SC2 n) or the second scan line (SC2 n−1). The pixel 150charges a voltage corresponding to the data signal and emits light witha corresponding luminance. In a like manner as the gate driver 210, thedata driver 230 shown in FIG. 2 is formed in the first driving chip 200on the flexible film 400, and is shown in FIG. 2 for convenience ofdescription.

The data wires (DW) are provided on the second gate wires GW2 with athird insulating layer (ILD) therebetween, and are extended in thesecond direction crossing the first direction. The data wires (DW)include data lines (DA1-DAm) and a driving power line (ELVDDL). The dataline (DAm) is connected to the data driver 230 and receives a datasignal from the data driver 230. The driving power line (ELVDDL) isconnected to a first power source (ELVDD) and receives driving powerfrom the first power source (ELVDD).

The driving power line (ELVDDL) and the data line (DAm) may be formed onthe same layer on the third insulating layer (ILD). The driving powerline (ELVDDL) and the data line (DAm) may also be formed on differentlayers. For example, the driving power line (ELVDDL) may be formed onthe same layer as the first gate wire GW1, and the data line (DAm) maybe formed on the same layer as the second gate wire GW2. On thecontrary, the driving power line (ELVDDL) may be formed on the samelayer as the second gate wire GW2, the data line (DAm) may be formed onthe same layer as the first gate wire GW1, and the display unit 140includes a plurality of pixels 150 provided in crossing regions of thefirst gate wires GW1, the second gate wires GW2, and the data wires(DW). The pixel 150 includes an organic light emitting element foremitting light with luminance corresponding to a driving current thatcorresponds to the data signal, and a pixel circuit for controlling thedriving current flowing to the organic light emitting element. The pixelcircuit is connected to the first gate wires GW1, the second gate wiresGW2, and the data wires (DW), and the organic light emitting element isconnected to the pixel circuit. The pixel 150 is not limited to containthe organic light emitting element, for example, it may contain a liquidcrystal display element or an electrophoretic display element.

The organic light emitting element of the display unit 140 is connectedto an external first power source (ELVDD) with a pixel circuittherebetween, and a second power source (ELVSS). The first power source(ELVDD) and the second power source (ELVSS) supply driving power andcommon power respectively to the pixel 150 of the display unit 140, andthe pixel 150 responds to the data signal according to the driving powerand the common power provided to the pixel 150 by emitting light withluminance corresponding to the driving current passing through theorganic light emitting element from the first power source (ELVDD).

According to an exemplary embodiment of the inventive concept, the gatewires that traverse the pixel 150 in the first direction and do notoverlap each other, that is, the first gate wires GW1 including a secondscan line (SC2 n−1) and an emission control line (En) and the secondgate wires GW2 including a first scan line (SC2 n) and an initializationpower line (Vinit) are not provided on the same layer, but the gatewires that are the first gate wires GW1 and the second gate wires GW2are provided on different layers with a second insulating layer G12therebetween so that the distance (W) between the neighboring gate wiresprovided on the different layers may be formed to be narrow and morepixels 150 may be formed in the same area. Thus, a high-resolutiondisplay device may be formed.

Referring to FIG. 1 and FIG. 2, a plurality of connection wires 300connect a plurality of signal lines, including a data line (DAm) and ascan line (SCn) of the display panel 100 to the pad (P). Here, theconnection wires 300 correspond to the fan out unit in the displaydevice for connecting the gate line or the data line to the gate IC orthe data IC.

According to the first exemplary embodiment of the inventive concept,part of a plurality of connection wires 300 includes a section extendedto the display panel 100 from the pad (P) in the second direction, inwhich these connection wires are extended to the display panel 100 in aforward direction, bent and extended toward the pad (P) in a backwarddirection, and then bent and extended to the display panel 100, so as toincrease resistance of the connection wires. The plurality of connectionwires 300 are bent at least twice, and these wires are bent towardbackward direction at least once. For example, the connection wires mayinclude a section formed by rotating the letter S by 90 degrees.

As shown in FIG. 1, a plurality of connection wires 300 connected to thedisplay panel 100 are divided and connected to the connecting padterminals P1 and P3 of two regions. That is, some of the connectionwires are connected to the connecting pad terminal P1 and the rest ofthe connection wires are connected to the connecting pad terminal P3. Adummy pad terminal P2 may be provided between the connecting padterminals P1 and P3. That is, no connection wire is connected to thedummy pad terminal P2.

A region through which a portable terminal, for example a camera modulefor a smartphone or a tablet PC passes, may be provided in a regionthrough which the connection wire 300 passes. That is, the camera modulemay pass through a hole (H) of FIG. 1. As such, the connection wire isnot connected to the dummy pad terminal P2. Accordingly, the hole isprovided between the connection wires 311 and 313, which neighbor eachother, and lengths of the connection wires 311 and 313 become different.When the signal is transmitted through the connection wires 311 and 313,resistance values are different from each other, thus signals may notsimultaneously reach the display panel 100.

In the first exemplary embodiment of the inventive concept, to solve theabove problem, for the purpose of increasing resistance of the shortconnection wire, part of a plurality of connection wires 300 includes asection extended to the display panel 100 from the pad (P) in the seconddirection, in which the connection wires 300 are extended to the displaypanel 100 in a forward direction, bent and extended toward the pad (P)in a backward direction, and then bent and extended to the display panel100. The connection wires 300 are bent at least twice, and these wiresare bent toward backward direction at least once.

In detail, the neighboring first and second connection wires 311 and 312from among a plurality of connection wires 300 respectively includefirst connectors 311 a and 312 a, second connectors 311 b and 312 b, andextensions 311 c and 312 c. Referring to FIG. 5, the first connectionwire 311 includes a first connector 311 a, a second connector 311 b, andan extension 311 c.

The first connector 311 a is connected to a pad (P). The first connector311 a is extended and formed in the second direction. That is, the firstconnector 311 a is formed to extend to the display panel 100 from thepad (P). As shown in FIG. 1 and FIG. 5, the first connector 311 a may beformed in a linear manner in the second direction.

The second connector 311 b is connected to the display panel 100 and isconnected to the first connector 311 a through the extension 311 c. Thesecond connector 311 b is formed to be bent and then connected to asignal line of the display panel 100.

The extension 311 c is connected between the first and second connectors311 a and 311 b to increase resistance of the first connection wire 311.The extension 311 c increases the length of the connection wire toincrease resistance of the wire. Here, the extension 311 c correspondsto the section formed by rotating the letter S by 90 degrees.

In detail, the extension 311 c includes a plurality of first bridges(311 c-1, 311 c-3, 311 c-5) and a plurality of second bridges (311 c-2,311 c-4). The first bridges (311 c-311 c-3, and 311 c-5) are disposedparallel to the first connector 311 a, and the second bridges (311 c-2and 311 c-4) are disposed to be vertical to the first bridges (311 c-1,311 c-3, and 311 c-5). The plurality of second bridges may form apredetermined angle with the first bridges, in which the predeterminedangle is 90 degrees or not 90 degrees. For example, one first bridge mayform an angle smaller than 90 degrees with one second bridge, then thissecond bridge may form an angle larger than 90 degrees with the nextfirst bridge.

The first bridges (311 c-1, 311 c-3, and 311 c-5) and the second bridges(311 c-2, 311 c-4) are alternately connected to each other. When thefirst bridges (311 c-1, 311 c-3, and 311 c-5) and the second bridges(311 c-2 and 311 c-4) are alternately connected, as shown in FIG. 5, theextension 311 c may be disposed in a like manner as the letter S isrotated by 90 degrees. That is, the first bridge (311 c-1), the secondbridge (311 c-2), the first bridge (311 c-3), the second bridge (311c-4), and the first bridge (311 c-5) are sequentially disposed so thatthey may be disposed according to the above-noted shape.

The first bridge (311 c-1) is connected to the first connector 311 a,and is disposed along the same direction as the first connector 311 a.As such, the first connection wire 311 is extended to the display panel100 from the pad (P) and a section going backward is formed in theextension 311 c. Here, the backward section represents a sectionextended to the display panel 100 from the pad (P) in the seconddirection on the first connection wire 311, in which the connection wire311 is extended to the display panel 100 in a forward direction, bentand extended toward the pad (P) in a backward direction in the backwardsection, and then bent and extended to the display panel 100. Theconnection wire 311 is bent at least twice, and the wire is bent towardbackward direction at least once.

The first bridges (311 c-1, 311 c-3, and 311 c-5) are disposed parallelto each other. That is, the first bridges (311 c-1, 311 c-3, and 311c-5) are disposed parallel to the first connector 311 a. The neighboringfirst bridges (311 c-3 and 311 c-5) may be formed to have the samelength.

The second bridges (311 c-2 and 311 c-4) are disposed parallel to eachother. That is, the second bridges (311 c-2 and 311 c-4) are disposedparallel to be vertical to the first connector 311 a. The second bridges(311 c-2 and 311 c-4) may be formed to have different lengths.

The second connection wire 312 includes a first connector 312 a, asecond connector 312 b, and an extension 312 c.

The first connector 312 a is connected to the pad (P) in a like manneras the first connector 311 a of the first connection wire 311. In thiscase, the first connector 312 a is extended in the second direction.That is, the first connector 312 a is extended to the display panel 100from the pad (P). The first connector 312 a may be formed in a linearmanner in the second direction.

The second connector 312 b is connected to the display panel 100 and isconnected to the first connector 312 a through the extension 312 c. Thesecond connector 312 b may be bent and be connected to the signal lineof the display panel 100.

The extension 312 c is connected between the first and second connectors312 a and 312 b and may increase resistance of the second connectionwire 312. The extension 312 c increases the length of the connectionwire to increase resistance of the wire.

To increase the length of the connection wire, the extension 312 c isformed with a section configured by rotating the letter S by 90 degrees.

In detail, the extension 312 c includes a plurality of first bridges(312 c-1, 312 c-3, and 312 c-5) and a plurality of second bridges (312c-2 and 312 c-4). The first bridges (312 c-1, 312 c-3, and 312 c-5) aredisposed parallel to the first connector 312 a, and the second bridges(312 c-2 and 312 c-4) are disposed to be vertical to the first bridges(312 c-1, 312 c-3, and 312 c-5). The length (e.g., L1) of the firstbridges (312 c-1, 312 c-3, and 312 c-5) is formed to be greater than thelength (e.g., M1) of the second bridges (312 c-2 and 312 c-4). Theplurality of second bridges may form a predetermined angle with thefirst bridges, in which the predetermined angle is 90 degrees or not 90degrees. For example, one first bridge may form an angle smaller than 90degrees with one second bridge, then this second bridge may form anangle larger than 90 degrees with the next first bridge.

The first bridges (312 c-1, 312 c-3, and 312 c-5) and the second bridges(312 c-2 and 312 c-4) are alternately connected. When the first bridges(312 c-1, 312 c-3, and 312 c-5) and the second bridges (312 c-2 and 312c-4) are alternately connected, as shown in FIG. 5, the extension 312 cmay be disposed in a shape formed by rotating the letter S by 90degrees. That is, the first bridge (312 c), the second bridge (312 c-2),the first bridge (312 c-3), the second bridge (312 c-4), and the firstbridge (312 c-5) are sequentially arranged so they may be disposedaccording to the above-noted shape.

The first bridge (312 c-1) is connected to the first connector 312 a andis disposed along the same direction as the first connector 312 a. Assuch, the second connection wire 312 has a section extending to thedisplay panel 100 from the pad (P) and going backward in the extension312 c. Here, the backward section represents a section extended to thedisplay panel 100 from the pad (P) in the second direction on the secondconnection wire 312, in which the connection wire 312 is extended to thedisplay panel 100 in a forward direction, bent and extended toward thepad (P) in a backward direction in the backward section, and the bentand extended to the display panel 100. The connection wire 312 is bentat least twice, and the wire is bent toward backward direction at leastonce.

The extension 311 c of the first connection wire 311 and the extension312 c of the second connection wire 312 may be formed to be rotated by180 degrees and to be symmetrical with each other. When the extension311 c of the first connection wire 311 is rotated by 180 degrees withrespect to a virtual line (I1) passing through the centers of theextension 311 c and 312 c in the first direction, it may become the sameshape as the extension 312 c of the second connection wire 312.

The neighboring first and second connection wires 311 and 312 from amonga plurality of connection wires 300 are separated and disposed with apredetermined gap D1 to form the above-noted shape. That is, as shown inFIG. 4 and FIG. 6, the two first and second connection wires 311 and 312are extended and formed with a constant gap D1 therebetween.

For example, the first bridges (311 c-1, 311 c-3, and 311 c-5) of theneighboring first connection wire 311 are disposed separately from thesecond bridges (312 c-1, 312 c-3, and 312 c-5) of the second connectionwire 312 with a constant gap D1 The second bridges (311 c-2 and 311 c-4)of the neighboring first connection wire 311 are disposed separatelyfrom the second bridges (312 c-2 and 312 c-4) of the second connectionwire 312 with the constant gap D1. Here, the term “bridge” may also bereferred to as “portion”.

According to the first exemplary embodiment of the inventive concept, itis easy to increase the length of the wire within a predetermined widthsince the first and second connection wires 311 and 312 include thesection going backward in the second direction. As shown in FIG. 4 andFIG. 5, the first and second connection wires 311 and 312 include thesection going backward in the second direction so resistance of theconnection wire may be increased without deteriorating integrity of theconnection wire.

Referring to FIG. 6, the first and second connection wires 311 and 312are formed on different layers. The first connection wire 311 and thesecond connection wire 312 are sequentially stacked on the substrate(SUB). An insulating layer IL2 may be provided between the first andsecond connection wires 311 and 312.

The first connection wire 311 may be formed on the same layer as thefirst gate wire GW1 of the display panel 100. The second connection wire312 may be formed on the same layer as the second gate wire GW2 of thedisplay panel 100.

When the first and second connection wires 311 and 312 are formed on asingle layer and the gap D1 between the first and second connectionwires 311 and 312 is reduced, the possibility of short-circuiting thefirst and second connection wires 311 and 312 is increased. An etchingprocess has a limit in reducing the gap D1 between the first and secondconnection wires 311 and 312. However, according to the first exemplaryembodiment of the inventive concept, the gap D1 between the first andsecond connection wires 311 and 312 may be minimized by forming thefirst and second connection wires 311 and 312 on different layers. Thatis, when the gap D1 between the first and second connection wires 311and 312 is reduced, the possibility of short-circuiting the first andsecond connection wires 311 and 312 is reduced.

FIG. 13 shows a comparison of connection wires configured with a singlelayer and double layers.

Referring to FIG. 13 (A), when the first and second connection wires 311and 312 are formed with the constant gap D1, an insulating layer isprovided between the first and second connection wires 311 and 312, thusthe possibility of short circuiting the first and second connectionwires 311 and 312 by a foreign particle (E) is low. However, as shown inFIG. 13 (B), when the first and second connection wires 311 and 312 areformed on the same layer with the same gap D1 shown in FIG. 13 (A), thepossibility of short circuiting the first and second connection wires311 and 312 by a foreign particle (E) is increased.

As described, the first and second connection wires 311 and 312 areformed on different layers to prevent the first and second connectionwires 311 and 312 from being short-circuited by a foreign particle.

The gap D1 between the first and second connection wires 311 and 312 maybe minimized so that the integrity of the connection wire may beincreased. The width S1 of the first connection wire 311 may correspondto the width S2 of the second connection wire 312.

As described in the first exemplary embodiment of the inventive concept,the first and second connection wires 311 and 312 are formed as doublelayers, and they may be configured to be triple or quadruple layers.

Referring to FIG. 1, the pad (P) is configured with a plurality ofconnecting pad terminals P1 and P3 and a plurality of dummy padterminals P2.

As described above, a plurality of connecting pad terminals P1 and P3may be connected to a plurality of connection wires 300. That is, someof the connection wires are connected to the connecting pad terminal P1and the rest of the connection wires are connected to the connecting padterminal P3.

A dummy pad terminal P2 may be provided between the connecting padterminals P1 and P3. The connection wire is not connected to the dummypad terminal P2.

Regarding the display device according to the first exemplary embodimentof the inventive concept, the flexible film 400 is connected to the pad(P) in the peripheral area (PA), A first driving chip 200 for drivingthe display panel 100 may be mounted on the flexible film 400. Theflexible film 400 may be a chip on film (COF).

The flexible film 400 may be generated by forming a plurality of metalwires on a flexible base film.

The first driving chip 200 may be installed on the base film and maygenerate a driving signal. For example, the first driving chip 200 maybe a scan driving circuit for receiving a control signal and generatinga scan signal or a data driving circuit for generating a data signal.That is, the gate driver 210 or the data driver 230 may be formed in thefirst driving chip 200.

In the first exemplary embodiment of the inventive concept, the COF typeflexible film 400 is disposed on the pad (P), moreover, as shown in FIG.9, a chip on glass type second driving chip 500 may be disposed in theperipheral area (PA) of the substrate (SUB). A first side of the seconddriving chip 500 is connected to the pad (P). A second side of thesecond driving chip 500 may be connected to another pad (N) by anadditional wire formed in the peripheral area (PA).

In a like manner as the first driving chip 200, the second driving chip500 may be a scan driving circuit for receiving a control signal andgenerating a scan signal or a data driving circuit for generating a datasignal. That is, the gate driver 210 or the data driver 230 may beformed in the second driving chip 500.

In an exemplary variation of the connection wire according to the firstexemplary embodiment of the inventive concept, the first and secondconnection wires 331 and 332 are disposed such that their neighboringedges may overlap each other.

Referring to FIG. 7 and FIG. 8, no gap is provided between the first andsecond connection wires 331 and 332, and the edges facing each otheroverlap the same. That is, the first and second connection wires 311 and312 are separately disposed with the constant gap D1 in FIG. 4 to FIG.6, and they may be disposed such that the gap D1 may be close to 0 inthe exemplary variation shown in FIG. 7 and FIG. 8.

According to the present exemplary variation, the integrity of aplurality of connection wires 300 disposed in the peripheral area (PA)of the substrate (SUB) may be further improved. That is, the connectionwires 300 may be more densely disposed by removing the gap among theconnection wires 300.

A display device including connection wires according to a secondexemplary embodiment of the inventive concept will now be described withreference to FIG. 10 to FIG. 12. The same detailed descriptions as thefirst exemplary embodiment of the inventive concept will be omitted inthe second exemplary embodiment of the inventive concept.

FIG. 10 shows an enlarged view of a connection wire according to thesecond exemplary embodiment of the inventive concept, FIG. 11 showsfirst and second connection wires of FIG. 10, and FIG. 12 shows across-sectional view with respect to line of FIG. 10.

Referring to FIG. 10 and FIG. 11, in a like manner as the firstexemplary embodiment of the inventive concept, the neighboring first andsecond connection wires 351 and 352 from among a plurality of connectionwires 300 include a section extended to the display panel 100 from thepad (P) in the second direction, in which the connection wires 351 and352 are extended to the display panel 100 in a forward direction, bentand extended toward the pad (P) in a backward direction, and then bentand extended to the display panel 100 so as to increase the resistanceof the connection wires. The connection wires 351 and 352 are bent atleast twice, and these wires are bent toward backward direction at leastonce. For example, the connection wires may include a section formed byrotating the letter S by 90 degrees.

The extension 351 c of the first connection wire 351 and the extension352 c of the second connection wire 352 may be formed to be rotated by180 degrees and to be symmetrical with each other. When the extension351 c of the first connection wire 351 is rotated by 180 degrees withrespect to a virtual line (l2) passing between the extension 351 c ofthe first connection wire 351 and the extension 352 c of the secondconnection wire 352 in the first direction, it may become the same shapeas the extension 352 c of the second connection wire 352.

Referring to FIG. 11, the first connection wire 351 includes a firstconnector 351 a, a second connector 351 b, and an extension 351 c.

The first connector 351 a is connected to the pad (P). The firstconnector 351 a is extended and formed in the second direction. That is,the first connector 351 a is formed to extend to the display panel 100from the pad (P). The first connector 351 a may be formed in a linearmanner in the second direction.

The second connector 351 b is connected to the display panel 100 and isconnected to the first connector 351 a through the extension 351 c. Thesecond connector 351 b is formed to be bent and then connected to asignal line of the display panel 100.

The extension 351 c is connected between the first and second connectors351 a and 351 b to increase resistance of the first connection wire 351.The extension 351 c increases the length of the connection wire toincrease resistance of the wire.

The extension 351 c may include a section formed by rotating the letterS by 90 degrees so as to increase the length of the connection wire.

The extension 351 c includes a plurality of first bridges (351 c-1, 351c-3, and 351 c-5) and a plurality of second bridges (351 c-2, 351 c-4,and 351 c-6). The first bridges (351 c-1, 351 c-3, and 351 c-5) aredisposed parallel to the first connector 351 a, and the second bridges(351 c-2, 351 c-4, and 351 c-6) are disposed to be vertical to the firstbridges (351 c-1, 351 c-3, and 351 c-5). The second bridges (351 c-2 and351 c-4) may be formed to have the same length. The plurality of secondbridges may form a predetermined angle with the first bridges, in whichthe predetermined angle is 90 degrees or not 90 degrees. For example,one first bridge may form an angle smaller than 90 degrees with onesecond bridge, then this second bridge may form an angle larger than 90degrees with the next first bridge.

The first bridges (351 c-1, 351 c-3, and 351 c-5) and the second bridges(351 c-2, 351 c-4, and 351 c-6) are alternately connected to each other.When the first bridges (351 c-1, 351 c-3, and 351 c-5) and the secondbridges (351 c-2, 351 c-4, and 351 c-6) are alternately connected, asshown in FIG. 11, the extension 351 c may be disposed in a like manneras the letter S is rotated by 90 degrees. That is, the first bridge (351c-1), the second bridge (351 c-2), the first bridge (351 c-3), thesecond bridge (351 c-4), the first bridge (351 c-5), and the secondbridge (351 c-6) are sequentially disposed so they may be disposedaccording to the above-noted shape.

Differing from the first exemplary embodiment of the inventive concept,the first bridge of the neighboring second connection wire 352 is notprovided among the first bridges (351 c-1, 351 c-3, and 351 c-5) of thefirst connection wire 351. That is, the extensions of the first andsecond connection wires 311 and 312 overlap each other in the firstexemplary embodiment of the inventive concept, and the extensions of thefirst and second connection wires 351 and 352 are disposed separatelyfrom each other in the second exemplary embodiment of the inventiveconcept.

Referring to FIG. 12, in a like manner as the first exemplary embodimentof the inventive concept, the first and second connection wires 351 and352 are formed on different layers. The first connection wire 351 andthe second connection wire 352 are sequentially stacked on the substrate(SUB). An insulating layer IL2 may be provided between the first andsecond connection wires 351 and 352.

In the display device including connection wires according to anexemplary embodiment of the inventive concept, the first and secondconnection wires 311 and 312 are formed on different layers to preventthe first and second connection wires 311 and 312 from beingshort-circuited by a foreign particle, and the gap between theneighboring first and second connection wires 311 and 312 may beminimized to increase the integrity of the connection wires.

While this invention has been described in connection with what ispresently considered to be practical exemplary embodiments, it is to beunderstood that the invention is not limited to the disclosedembodiments, but, on the contrary, is intended to cover variousmodifications and equivalent arrangements included within the spirit andscope of the appended claims.

What is claimed is:
 1. A display device comprising: a substrateincluding a display area for displaying an image and a peripheral areaneighboring the display area; a plurality of signal lines disposed inthe display area; a pad disposed in the peripheral area and including aplurality of pad terminals; and a plurality of connection wiresconnecting the signal lines and the pad terminals, wherein theconnection wires include a first connection wire and a second connectionwire adjacent to each other, the first connection wire and the secondconnection wire are bent at least twice in a first direction and asecond direction crossing the first direction in the peripheral area,the first connection wire and the second connection wire each includes:a first portion and a second portion extending in the second direction;and a third portion connecting the first portion and the second portionand extending in the first direction, and the first portion, the secondportion, and the third portion of the first connection wire are disposedbetween the first portion and the second portion of the secondconnection wire in the first direction.
 2. The display device of claim1, further comprising: an insulating layer disposed on the substrate,wherein the first connection wire is disposed between the substrate andthe insulating layer and the second connection wire is disposed on theinsulating layer.
 3. The display device of claim 1, wherein the firstconnection wire and second connection wire are separated from each otherwith a predetermined gap.
 4. The display device of claim 1, wherein thethird portion of the second connection wire is closer to the pad thanthe third portion of the first connection wire.
 5. The display device ofclaim 1, wherein the first direction and the second direction areperpendicular to each other.
 6. The display device of claim 1, whereinthe first portions and the second portions are parallel to each other.7. The display device of claim 1, wherein the third portions areparallel to each other.
 8. The display device of claim 7, wherein thethird portions have different lengths.
 9. The display device of claim 8,wherein the third portion of the second connection wire is longer thanthe third portion of the first connection wire.
 10. The display deviceof claim 1, wherein the first connection wire and the second connectionwire each further includes: a fourth portion extending in the seconddirection; and a fifth portion connecting the second portion and thefourth portion and extending in the first direction.
 11. The displaydevice of claim 10, wherein the second portion, the fourth portion, andthe fifth portion of the second connection wire are disposed between thesecond portion and the fourth portion of the first connection wire inthe first direction.
 12. The display device of claim 10, wherein thefifth portion of the second connection wire is closer to the pad thanthe fifth portion of the first connection wire.
 13. The display deviceof claim 1, wherein the pad further includes a plurality of dummy padterminals not connected to the connection wires.
 14. The display deviceof claim 1, further comprising: a flexible film connected to the pad andincluding a first side on which a first driving chip is provided. 15.The display device of claim 1, further comprising: a second driving chipdisposed in the peripheral area and connected to the pad.
 16. Thedisplay device of claim 1, wherein signal lines connected to the firstconnection wire and second connection wire from among the signal linesare disposed as different layers.
 17. The display device of claim 1,wherein the connection wires are formed to be double layers, triplelayers, or quadruple layers.
 18. The display device of claim 1, whereinthe signal lines are gate lines.
 19. The display device of claim 1,wherein the signal lines are data lines.
 20. A display devicecomprising: a display panel including a display area and a peripheralarea; signal lines in the display area; pad terminals in the peripheralarea; and connection wires connecting the signal lines and the padterminals in the peripheral area, wherein the connection wires include afirst connection wire and a second connection wire adjacent to eachother and grouped as a pair, wherein the first connection wire and thesecond connection wire each includes: a first portion, a second portion,and a third portion sequentially disposed in a first direction andextending in a second direction different from the first direction; afourth portion connecting the first portion and the second portion andextending in the first direction; and a fifth portion connecting thesecond portion and the third portion and extending in the firstdirection, wherein the first portion, the second portion, and the fourthportion of the first connection wire are disposed between the firstportion and the second portion of the second connection wire in thefirst direction, and wherein the second portion, the third portion, andthe fifth portion of the second connection wire are disposed between thesecond portion and the third portion of the first connection wire in thefirst direction.